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Finding the Fourth Proportional to 19,772.60, 29,658.94 and 7,287.20

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Solution

The fourth proportional to 19,772.60, 29,658.94 and 7,287.20 is: 10,930.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,772.60 : 29,658.94 = 7,287.20 : x
  2. Step 2: Convert to fraction form
    19,772.60/29,658.94 = 7,287.20/x
  3. Step 3: Cross multiply
    19,772.60x = 29,658.94 × 7,287.20
  4. Step 4: Simplify right side
    19,772.60x = 216,130,627.57
  5. Step 5: Solve for x
    x = 216,130,627.57/19,772.60
  6. Step 6: Final answer
    x = 10,930.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.